Run of unchanged for mtr

Try this locally (using the lintian-brush package):

debcheckout mtr
cd mtr
just-build --revision=git-v1:392afaded90c5b42ebf79d24f43e59587a330edd
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
Get:7 http://deb.debian.org/debian unstable/main Sources 2020-04-12-1404.37.pdiff [7799 B]
Get:7 http://deb.debian.org/debian unstable/main Sources 2020-04-12-1404.37.pdiff [7799 B]
Get:8 http://deb.debian.org/debian unstable/main amd64 Packages 2020-04-12-0914.37.pdiff [4809 B]
Get:9 http://deb.debian.org/debian unstable/main amd64 Packages 2020-04-12-1404.37.pdiff [13.0 kB]
Get:9 http://deb.debian.org/debian unstable/main amd64 Packages 2020-04-12-1404.37.pdiff [13.0 kB]
Fetched 236 kB in 2s (124 kB/s)
Reading package lists...
E: Failed to fetch http://charis.vpn.jelmer.uk:9914/archive/unchanged/Packages.xz  File has unexpected size (3730888 != 3729632). Mirror sync in progress? [IP: 2a01:348:125:8::5 9914]
   Hashes of expected file:
    - Filesize:3729632 [weak]
    - SHA256:d96fccb756b1d797eadac4c5cc207cd451564602546b179ff0adb89f292cd4b5
   Release file created at: Sun, 12 Apr 2020 19:21:36 +0000
E: Some index files failed to download. They have been ignored, or old ones used instead.
E: apt-get update failed

Full worker log Full build log (1)